A great deal of advanced science and technology has been ______ since China carried out the reform and opening policyA.brought downB.brought inC.brought outD.brought up
网友回答
B解析考查短语辨析，brought down 降低，brought in引入，brought out产生，brought up提出，句意：自从中国执行改革开放以来，许多先进的科学技术已经被引入了。故选B。